<html><head><title>with expression to evaluate</title><meta name="HandheldFriendly" content="True"></head><body>with expression to evaluate<br><br><b>case</b> expression   <b>when</b> expression <b>then</b> expression   [<b>when</b> expression <b>then</b> expression]...   [<b>else</b> expression] <b>end</b></body></html>